Materials / Compare
Ceramic Alumina 96% vs. Plastic HDPE
Compare Ceramic Alumina 96% vs. Plastic HDPE strength, stiffness, weight and thermal properties.
| Try it on a partA sample part to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | not given (tensile used) | 24MPasourcetypical, tensile stress at yield 23 °C, 50 mm/min ISO 527 |
| Ultimate tensile strength | 221MPasourcetypical tensile strength, 25 °C (ACMA Test #4) | not sourced |
| Compressive strength | 2,068MPasourcetypical, 20 °C (ASTM-C773) | not sourced |
| Flexural strength | 358MPasourceflexural strength (MOR), 20 °C (ASTM-F417) | not sourced |
| Elongation at break | not sourced | not sourced |
| Young's modulus (stiffness) | 303GPasourcetypical, 20 °C (ASTM-C848) | 0.9GPasourcetypical, tensile modulus 23 °C ISO 527 |
| Density | 3,720kg/m³sourcetypical (ASTM-C20) | 950kg/m³sourcetypical, ISO 1183 |
| Strength to weight | 59.4kN·m/kg2.35x higher | 25.3kN·m/kg |
| Stiffness to weight | 81.5MN·m/kg86x higher | 0.947MN·m/kg |
| Poisson's ratio | 0.21sourcetypical, 20 °C (ASTM-C848) | 0.4–0.45sourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE) |
| Shear modulus | 125GPa396x stiffer in shear | 0.316GPa |
| Bulk modulus | 174GPa | 2GPa |
| Speed of sound | 9,025m/s | 973m/s |
| Thermal | ||
| Thermal conductivity | 24.7W/m·Ksourcetypical, 20 °C (ASTM-C408) | 0.4–0.49W/m·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE) |
| Thermal expansion | 8.2µm/m·Ksourcemean, 25-1000 °C (ASTM-C372) | 120µm/m·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE) |
| 100 mm part over a 50 °C swing | 41µm growth14.6x less | 600µm growth |
| Specific heat | 880J/kg·Ksourcetypical, 100 °C (ASTM-E1269) | 2,250J/kg·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE) |
| Heats up and cools (diffusivity) | 7.55mm²/s36.2x faster | 0.208mm²/s |
| Thermal shock resistance | 1,736W/m30.5x more resistant | 56.9W/m |
| Values for | CoorsTek AD-96, nominal 96% Al2O3 sintered alumina, typical values; CoorsTek "Ceramic Seal Material Properties" (© 2018, 01899 F). AD-96 is the general 96% grade, not the ADS-96R substrate grade. | LyondellBasell Hostalen 23050 B high density polyethylene, typical ISO values |
Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Is Ceramic Alumina 96% stronger than Plastic HDPE?
Ceramic Alumina 96% is stronger: its tensile strength is 221 MPa against yield strength 24 MPa for Plastic HDPE (9.21x).
Which is lighter, Ceramic Alumina 96% or Plastic HDPE?
Plastic HDPE is lighter: 950 kg/m³ against 3,720 kg/m³ for Ceramic Alumina 96%.
Which is stiffer, Ceramic Alumina 96% or Plastic HDPE?
Ceramic Alumina 96% is stiffer: Young's modulus 303 GPa against 0.9 GPa for Plastic HDPE, so the same part in Ceramic Alumina 96% deflects less under the same load.
Which is lighter for the same job, Ceramic Alumina 96% or Plastic HDPE?
For the same stiffness or strength: Ceramic Alumina 96% is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam; Plastic HDPE is lighter for a strong panel or plate.
| Part that must be | Ceramic Alumina 96% | Plastic HDPE |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 86x heavier |
| Stiff beam (bending) | lighter | 4.69x heavier |
| Stiff panel or plate | lighter | 1.78x heavier |
| Strong rod or tie | lighter | 2.35x heavier |
| Strong beam | lighter | 12% heavier |
| Strong panel or plate | 29% heavier | lighter |
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Which conducts heat better, Ceramic Alumina 96% or Plastic HDPE?
Ceramic Alumina 96% conducts heat better: 24.7 W/m·K against 0.445 W/m·K for Plastic HDPE.
Which expands less with temperature?
Ceramic Alumina 96% expands less: 8.2 µm/m·K against 120 µm/m·K for Plastic HDPE.